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v[1] = 1; for(n = 1, N, my(i = n + 1); v[i] = ((3*n - 2 + (6*n - 1)*x + (3*n + 1)*x^2)*v[i - 1])/(1 + x)); v};\nrow(n, p) = {my(c = Vecrev(p)); c};\nT(N) = {my(v = P(N)); concat(vector(#v, i, row(i - 1, v[i])))};\nT(9)","reading":{"first_row":0,"offset":0,"reversed":false,"trim_zeros":"none","regular_triangle":false}}],"derivation":{"root":"n-1a0f876fa1441737","steps":["basis A013610","x \u21a6 x/(x+1)"],"edges":["e-6e846af4747cc041","e-617fbe3fd76f8d1d"],"text":"basis-map coefficients of A371080, shifted \u2192 basis A013610 \u2192 x \u21a6 x/(x+1)"},"headline":"basis-map coefficients of A371080, shifted \u2192 basis A013610 \u2192 x \u21a6 x/(x+1)","chain":null}